I've been diving my first drysuit (Diving concepts trilam) for 400 dives and its about to give up the ghost. I'm seriously considering switching to neoprene but have one big issue I hope others can help me with. The main reason I love diving my drysuit is that once properly weighted (it took me about 10 dives and needs continual adjustment with changes in gear configuration), I only use my BC on the surface. I do not want to manage two air cells. I have heard some say a neoprene drysuit can be dove the same way, but others say they can't. I'm contemplating buying a seasoft 4.5 mm (regular neoprene) so am aware that the buoyancy of the suit itself will change with depth. Anyone out there to weigh in?